Re: [PATCH 1/2] perf tools: Ensure --symfs ends with '/'

From: Arnaldo Carvalho de Melo
Date: Tue Jul 29 2014 - 08:33:18 EST


Em Tue, Jul 29, 2014 at 02:02:46PM +0900, Minchan Kim escreveu:
> On Fri, Jul 25, 2014 at 10:31:47AM +0900, Namhyung Kim wrote:
> > Minchan reported that perf failed to load vmlinux if --symfs argument
> > doesn't end with '/' character. So make sure that the symfs always
> > ends with the '/'.
> >
> > Reported-by: Minchan Kim <minchan@xxxxxxxxxx>
> > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
>
> Both patches work and are handy to me.
> Thanks Namhyung.

I haven't said it is not :-) Just that it should be fixed in a different
way.

Can you please try the patch below instead?

David, was there any reason not to do it like done in this patch?

- Arnaldo

---
annotate.c | 4 ++--
dso.c | 8 ++++----
symbol.c | 2 +-
3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 809b4c50beae..e67ef4a2b356 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -900,7 +900,7 @@ int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
bool delete_extract = false;

if (filename) {
- snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
+ snprintf(symfs_filename, sizeof(symfs_filename), "%s/%s",
symbol_conf.symfs, filename);
}

@@ -922,7 +922,7 @@ fallback:
* DSO is the same as when 'perf record' ran.
*/
filename = (char *)dso->long_name;
- snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
+ snprintf(symfs_filename, sizeof(symfs_filename), "%s/%s",
symbol_conf.symfs, filename);
free_filename = false;
}
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 90d02c661dd4..f81550583429 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -79,7 +79,7 @@ int dso__read_binary_type_filename(const struct dso *dso,
while (last_slash != dso->long_name && *last_slash != '/')
last_slash--;

- len = scnprintf(filename, size, "%s", symbol_conf.symfs);
+ len = scnprintf(filename, size, "%s/", symbol_conf.symfs);
dir_size = last_slash - dso->long_name + 2;
if (dir_size > (size - len)) {
ret = -1;
@@ -108,17 +108,17 @@ int dso__read_binary_type_filename(const struct dso *dso,
case DSO_BINARY_TYPE__VMLINUX:
case DSO_BINARY_TYPE__GUEST_VMLINUX:
case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
- snprintf(filename, size, "%s%s",
+ snprintf(filename, size, "%s/%s",
symbol_conf.symfs, dso->long_name);
break;

case DSO_BINARY_TYPE__GUEST_KMODULE:
- snprintf(filename, size, "%s%s%s", symbol_conf.symfs,
+ snprintf(filename, size, "%s/%s/%s", symbol_conf.symfs,
root_dir, dso->long_name);
break;

case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
- snprintf(filename, size, "%s%s", symbol_conf.symfs,
+ snprintf(filename, size, "%s/%s", symbol_conf.symfs,
dso->long_name);
break;

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index eb06746b06b2..c3549d5955ea 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1468,7 +1468,7 @@ int dso__load_vmlinux(struct dso *dso, struct map *map,
if (vmlinux[0] == '/')
snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
else
- snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
+ snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s/%s",
symbol_conf.symfs, vmlinux);

if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
--
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